Decontamination

A scientific consortium for data-driven study of N95 filtering facepiece respirator decontamination.
Link: https://www.n95decon.org/

For the institutions that have the equipment, Duke provides guidance on vaporized hydrogen peroxide.
Link: Vaporized Hydrogen Peroxide

The CDC reviews the filtration performance and germicidal effectiveness of various decontamination methods, including vaporized hydrogen peroxide, UVGI, microwave and more.
Link: Decontamination and Reuse of Filtering Facepiece Respirators

Chris Akiba Wang has another guide. This time, measuring the UV-C intensity for a UV sterilization box.
Link: https://hackerfarm.jp/2020/03/nukemeter/

Brian Crabtree provides instructions on making a UV sterilizer with a 36W germicidal bulb. Nice, elegant construction.
Link: VC Sterilizer for COVID-19 Emergency

Dr. Peter P. Tsai, inventor of the electrostatic charging technology that makes the filter media of face masks including medical and N95, answers questions about N95 reuse. Avoid alcohol, but dry heat (65C for 30 min), steam and boiling water for 3 minutes work. UV possible, but needs testing.
Link: Dr. Peter P. Tsai Q&A

Michael Dubrovsky built a UVGI box for decontamination of masks and other small items. Great step-by-step instructions and videos.
Link: Part One - Basic build
Link: Part Two - Door interlock and timer

Possibillion shared the design for a sanitation tent to decontaminate users exposed to the virus.
Link: https://www.possibilliontech.com/covid19.html

Chris Akiba Wang posted instructions on how he created a UV-C irradiation box for decontaminating N95 masks. Nice detailed build, references studies.
Link: NukeBox

Dr. Fu-Shi Quan published an article in 2017 Nature regarding deactivation of influenza virus with salt, leading to possible mask reuse. Not strictly DIY, but methods describe pre-treating with NaCl, distilled water and Tween 20 (polysorb 20) as surfactant.
Link: Universal and reusable virus deactivation system for respiratory protection

Stanford Medicine tested several methods of face mask decontamination. Their top recommendation is hot air oven at 70C for 30 minutes.
Link: Addressing COVID-19 Face Mask Shortages

Nebraska Medicine COVID-19 Resource posts a method of decontamination of N95 respirators using Ultraviolet Germicidal Irradiation (UVGI).
Link: n-95-decon-process.pdf

Dr. Risa Wong outlines multiple methods of N95 respirator decontamination. TL;DR: simplest solution is bleach wipes.
Link: N95 Decontamination

Dan Fourie provides instructions on N95 respirator decontamination using a microwave. Instructions also available for using an oven.
Link: http://www.n95reuse.com/

WHO provides instructions on making hand sanitizer.
Link: Guide_to_Local_Production.pdf